Dust plug



FIG. 1 is a top rear right perspective view of a dust plug showing our new design.

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top front left perspective view thereof. 

CLAIM The ornamental design for a dust plug, as shown and described. 